Xbinding  machine



Nov. 13, 1923. 1,474,321

P. DE MATTIA GRINDING MACHINE Filed Aug. 6, 1921 4 Sheets- Sheet 1 WITNESSES I i M/I/E/VTOR PEHEDEMATHA Nov. 13 1923.

P. DE MATTIA GRINDING MACHINE Filed Aug. 6, 1921 4 Sheets-Sheet 2 Innmlll I ll"? W/ TA/ESSES PEIEPDEMITIA A TTORA/EVS Patented Nov. 13, 1923.

uNr-Tao STATES PATENT orrlcs.

PETER DE KATTIA, OF CLIFT ON, NEW JERSEY.

onmnmo 1140mm.

Application filed August 6, 1921. Serial No. 490,892. I

' of parts similar in outline, shall have their surfaces ground and dressed uniformly in exact correspondence. In suchmachines it is essential that there shall be a; freedom of movement of the part to be ground and dressed with relation to the grinding element, so that all ortions of its surface to be acted u on by the grinding element, may be proper y presented thereto, and at the same time there must be no liability of loose or lost motion, liable to produce chattering, but the work to be acted upon must at all times be rigidly held while acted upon by the grinding element and at the same time absolute freedom of movement must be provided, so that every portion of the surface to be acted upon may be presented to the grinding element as freely as though the part was held in the hands of the operator.

The object of the present invention therefore is to provide a grinding machine with work-supporting and iding instrumenat the article to be ground shall be rigidly supported yet be freely movable with relation to the grinding element at the effective point of operation, and having means whereby the work to be operated on may be accurately positioned and the operation of the grinding.

element thereon controlled, whereby each and every piece vof work of the same shape shall be ground and dressedto that extent which shall insure that all shall be exact duplicates.

To the above ends the present invention consists of the grinding machine and the devices and combinations of devices .which will be hereinafter described and claimed.

The present invention is illustrated in the accompanying drawings, in which:

Figure 1 shows the machine partly in elevation and partly in vertical section, the section being taken on the line 11 in Figure 4. i

Figure 2 shows the template holder in front elevation.

Figure 3 shows a sectional view taken on the line 33 in Figure l, lookingdownward in the direction of the arrow.

Figure shows a top plan view of the machine, illustrating the operation of the swinging work-support andalso showing in dotted lines that-the wqrk-support may be moved to present work to the action of either one of two grinding elements.

Figure 5 shows a horizontal sectional view taken on the line 5-5 in Figure 7, illustrating the manner of adjusting the work holder.

Figure 6 is a front elevation of the standard and grinding mechanisms, with the work-support omitted, parts being shown in section, the section being taken on the line 66 in Figure 1.

Figure 7 is an enlarged view showing in partial vertical section and partial elevation, the swinging work-support and illustrating the various adjustments, bearings and means whereby perfect freedom of motion is attained while at the same time pireserving rigidity of parts.

Similar reference characters will be emloyed throughout the specification and drawings to designate corresponding parts.

The machine comprises a vertical standard 1 rising from a base 2. At its upper end the standard 1 is divided, providing two sub-standards 3, which preferably are united at or near their upper ends by a cross-brace 4. This provides an open s ace 5 at the upper center, for a purpose w ich will be hereinafter set forth. The substandards 3 are provided with suitable bearings 6 in which is mounted a horizontal ly extending shaft 7, the said shaft at its opposite ends, carryin the grinding disks 8 which may be forme of emery, carborundumor other suitable material. The disks 8 are held to the ends of the shaft 7 be tween metal'collars 9 and 10, between which the disks 8 are clamped. suitable screws 11 being provided to effect the clamping action of the disks 9 and 10. The bearings for the shaft 7 preferably com-prise two members 12 and. 13, adjpstably held together and in alignment wit each other by means of an adjusting screw 14, and a set screw or stop 15, and as indicated in dotted lines in Figure 6 the bearing in the members 12, for the shaft 7 is substantially cylindrical, whereas that portion of the bearing in the members 13, tapers outwardly as indicated at 16, to receive the tapered portions of the shaft. This construction enables an accurate adjustment ofthe bearings for the shaft 7, whereby while providing for the free revolution of the shaft 7 [an movement or lost motion 0 any kind will be revented.

entrally disposed upon the shaft 7 and within the space 5, is fixedly secured a belt pulley 17, which is engaged and driven by a belt 18 which is in turn driven by a driving pulley 19 mounted on a shaft 20 carried in bearings supported by a bracket 21 projecting rearwardly from the standard 1. The shaft 20 also carries a belt pulley 22 driven by a belt 23 receiving motion from a suitable source of power, and'a loose pulley 24 may be provided, and a belt shifting device 25, whereby the belt 23 may be shifted from the fast piulley 22 to the loose pulley 24 as reulr q The work to be operated on is supported so that it may be moved horizontally in almost any direction with relation to the grinding wheels 8, in order to presentall surfaces which need grinding or finishing to the action of the grinding wheels 8, and to secure the best results the work is presented to the periphery of the grinding wheels in a plane approximating that which would be defined by a horizontal line extending diametrically across the grinding wheels and through the axes thereof.

To accomplish this result the work-support in the machine of the drawing consists of a plurality of vertically disposed, horizontally swinging, articulated frames 26, 27 and 28. The frame 26 is pivotally supported on Vertical pivots 29 and 30 mounted and adjustable in bearings 31 and 32, projecting from the standard 1 at the base of the opening 5, and carried by the connecting brace 4 at the top of the opening 5 res ectively, and in vertical alignment with each other and at the true vertical center of the machine between the grinding wheels 8, at the front thereof. By this arrangement the frame 26 has a swinging movement towards the right or left about the pivotal supports 29 and 30. The connection between the frame 26 and its pivotal supports comprises the rearward extending bearings 33 formed integrally with the frame 26. For lightness the frame 26 is provided with an opening 34 surrounded by the vertically disposed side pieces 35 and 36, and the top and bottom pieces 37 and 38. At the forward end of the frame 26 is the inter,

longitudinal Largest mediate frame 27, which is pivotally mounted for a horizontal swinging movement, on suitable bearings comprising the studs 40, mounted in the forwardly extending lugs 48 of frame 26, the arrangement being such that the frame 27 is supported by and moves with the frame 26 and at the same time may have a horizontal swinging movement about the studs 40 independent of and with relation to the frame 26. The frame 27 is provided with the forwardly extending arms 41 inthe forward ends of which are suitable bearings 42'carrying the studs 43 upon which is pivotally supported the yoke or frame 28 carrying the work-support 45.- Thisarrangement is such that the yoke or frame 28 has a swinging movement with the frames 26 and 27 and also has a swinging movement about its pivotal supports 43 independently of the movement of the frames 26 and 27. Preferably all of the frames 26, '27 and 28 will be formed with the hollowed parts as indicated at 46, in order to secure lightness of parts.

It is of course essential that the pivotal operation of the swinging ,frames shall be free, and yet that the parallelism of the vertical axes shall be at all times accurately maintained, as well as rigidly positioning the work in the desired horizontal plane with relation to the periphery of the grindthe forwardly projecting extensions 48 inwhich the studs 40 are mounted, said studs being provided with a threaded portion 49 engaged with the threaded sockets 50 andalso with lock nuts 51 whereby they may be prevented from turning after the desired adjustment thereof has been secured. Each of the studs 40 for a portion of its length is substantially smooth, and at. one end is provided with a head or disk 52, and adjacent the head or disk 52 the studs are slightly tapered as shown at 53. and engage a tapered bearing in a block 54. Between the block 54 and the inner opposing surfaces of the projections 48 are suitable anti-friction bearings 55, said bearings and the headed ends of the studs 40 being received within chambered sockets 56 carried by the rearwardly projecting extensions 57 of the frame 27.

This arrangement provides for antifriction bearings located in direct vertical lIO lIL.

' axial alignment with each other and whereby the said bearin can be accurately adjusted. (Jo-operating with the bearings 'ust described, which form the connection etween the swingi frames 26 and 27, are tension devices, w ich without in the slightest degree affecting the freedom of movement provided by the anti-friction bearings, yet insure that there shall be no undue lateral Wear of the pivots between the swinging frames 26 and 27 This tension mechanism comprises in the upper member a plug 58 having a smooth outer surface arranged to slide in a bearing 59, .which opens into a. socket -60. The lug 58 is provided with an anti-friction aring 61 which engages a vertically disposed pin 62 mounted in the parallel cats 63 carried by the frame 26 and about which the plug 58 is adapted to turn. Within the chamber the pl 58 is surrounded by a coil spring 621, which at one end is seated against the base of the chamber 60 and at its opposite end en the inner surface of a head 63, whic is carried by a threaded shank 64, which engages a threaded bearing in the plug 58. Obviously by turning the head 63 the tension of the sprlng 62 may be adjusted more or less as required. At the lower end a plug 65 is fitted in a bearing 66 and carries an anti-friction bearing 67 which engages a pin 68 mounted in the ears 69. At its forward end the plug 66 is provided with a socket 70, which receives one end of a coil spring 71, the opposite end being engaged by a threaded plug 72 which engages a threaded bearing 73, and in which it may be turned to adjust the tension of the spring 71.

It is to be observed that the upper spring tension device exerts a backward pull on the frame 27, whereas the lower tension device exerts an outward thrust on the frame 27, so that by properly adjusting these tension devices the true vertical axial position of the couplings between the frames'26 and 27 mav be obtained. It is of course understood that the head 63 and the projecting end 74 of the stud 72 are provided with suitable means whereby they may be engaged by a tool to t rn the same for the purpose of securing the desired tension in the coil springs 621.

Not only does the foregoing construction provide for the accurate adjustment of the a ticulation between the frames 26 and 27, hit to some extent the spring tension devices ssist in supporting theload and steadying the frame 27.

The frame 28 is mounted upon the studs 43 carr ed by the bearings 42 at the forward ends of the arms of the frame 27. The lower mud 43 has a threaded portion '75 which fits a threaded bearing 76, in which it may be turned and it is provided with a lock nut 77. At its upper end the stud 43 is tapered as shown at 78 and fits a tapered bearing in a block 7 9 forming a part of the anti-friction bearing 80, which is received within a chamber 81 in the arm 82 of the frame 28. In its upper-surface the arm 82 is provided with a chamber 83 which receives a nut 84 screwed to the upper end of the stud 43.

The foregoing arrangement is such that the turning of the stud 43 secures not only an adjustment of the bearing 80, but also secures the lower arm 82 of the frame'28 to the lower arm 41 of the frame 27. The stud 43 at the upper part of the frame 28 is provided with a tapered portion 84 received in the tapered bearing 85 in the upper arm 86 of the frame 28, and at its lower end it is provided with a. 'threaded portion 87 to which is threaded a nut 88.

The tapered portion 84 of the upperstud 43 is seated in a tapered bearing 89 in a bushing 90, whichv is adjustably mounted and secured bymeans of the complementary screw threads 91 in the forward end of the upper arm 41 of the frame 27, the lower end of the bushing being provided with a lock nut 92. The bushing also has a beveled seat or bearing 93 which is engaged by an enlarged beveled portion 94 of the stud 84 and, between the upper and lower beveled portions is formed a lubricating chamber 95.

It must be noted that the upper arm of the frame 28 is suspended in the up er arm of the frame 27 by means of the stu 84 and that adjustment is secured by adjusting the bushing 90.

The frame 28 is the work carryin frame and it is provided with any suitabe work support, such as the block 45, provided with the horizontally disposed, transversely extending parallel slots or grooves 96 adapted to receive the headed studs 97 and the bolts 98 of the bracket 99, upon which the work 100 is directly secured in any suitable manner. The block 45 is provided with the rearwardly extending, slotted ears 101 which project through an opening 102 formed in the front of the frame 28 and which carry a threaded nut 103 located between the slotted ears 101 and engaging the threaded portion 104 of a vertical shaft 105. The shaft 105 at its lower end is seated upon an adju table anti-friction bearing 106 and at its upper end is mounted to turn in a bearing 07 directly over and in line with the adjustable anti-friction bearing 106. By rotating the vertical shaft 105 the threaded nut 103 will be caused to move 11 or down as the case may be, to position t e work 100 in that position with relation to the operative periphery of the grinding disks 8 which may be required. For the purpose of rotating the vertical shaft 105, at or near its upper end, it is provided with a wormgear 108 which is engaged by a worm 109, mounted to turn in suitable bearings and provided with a head 110 by means of which it may be turned for the purpose of raising'or lowering the work supporting block 45. i

As shown in Figure 5 of the drawing the rear-face of the block 45 is provided with a vertically disposed guide having the beveled sides 111 arranged to engage the beveled guides 112 extending vertically on the frame 28 adjacent to the slot 102. For the purpose of affording access to the chamber in the frame 28 the rear face thereof will be provided with an opening 113 located at or near the vertical center thereof. It is to be noted that by the arrangement just described the work su porting block 45 .is rigidly mounted on te frame 28 but may be readily vertically adjusted by instrumentalities which are independent of the means by which the said block is slidingly supported.

With the work fixedly secured to the work supporting block 45 it'may be presented and subjected to the action of either of the grinding wheels 8 and all parts of its peripheral edge or surface brought under the action of the grinding wheels.

It is of course essential that some suitable means be provided whereby the action of the grinding wheels or disks shall not only 1mpart to the surface to be operated upon and to the article. a uniform finish but shall insure that the shape imparted shall be identical, in all of the articles of a given shape and size subjected to the action of the ma chine. To secure this result a template 114 is provided, which template is supported and held in the slot 115 of a template support 116, suitable set screws 117 being provided to fixedly secure the template in the template support. The template support is mounted upon the dovetail projection 118 whereby it may be laterally adjusted in one direction, such adjustment being secured by set screw 119. This provides for an adjustment along one axis or diameter. It is of course desirable to secure an adjustment in lines at right angles to the adjustment just described and for this purpose the dovetail 418 is mounted upon a carrier 119; which is sildingly connected to a block 120 fixedly secured to the upper portion 121 of the stud 43 and arranged-to turn therewith and with the frame 28. The block 120 has a rearwardly projecting portion 122 which carries a threaded bearing 123, which is engaged by an adjusting screw 124 supported fixedly,

' but to freely turn in. the bearing 125 of a downwardly extending projection 126 of the carrier 119. the said screw being provided -with a milled head 127. The lateral adjustment is secured by a screw 960 engaging the projection 418 and the downturned lug 490 of the support 116. By this arrangetions, so as to properly position the template with relation to the Work supported by the work support 45 and the edge of the grindingf disks. 1 e

he template 114 engages a guide or stop, of which there is one co-operating with each grinding disk which com rises a short cylindrical block 129, preferably of steel, which isadjustahlyi mounted in a carrier. This carrier comprises a dovetail slide 131 through which projects a rod 132, the slide at its forward end being slotted as at 133 and provided with notches 134, and the rod 132 is provided with a slotted head 135 to receive the short cylindrical steel block 129. The rear end of the rod 132 is threaded as at 136 and receives a threaded nut 137, by

means of which the rod may be drawn backward whereby to clamp the cylindrical block 129 against the notched ends of the slide 131. This provides for firmly locking the cylindrical blocks 129 and also for vertically adjusting thenrwithin the limits of their length. In order to adjust the guide as a whole so as to properly position it with relation to the peripheral edges of the disks 8, the slides 131 are arranged to slide in a guide 138 and moved therein by means of an adjusting screw 139 held in a threaded bearing 140 on the under side of the slide 131, and provided with a milled head 141 whereby an accurate longitudinal adjustment may be secured. When once adjusted the slide 131 is secured in any suitable manner.

The guides 138 are formed integrally with and permanentlysecured to the outer ends of cylindrical shanks 142 arranged to slide and be adjusted in bearings 143 at the upper ends of the sub-standards 3, but prevented from turning therein by means fof keys 144 Suitable adjusting screws 145 are provided whereby to move the shanks 142 in their bearings.

By the foregoing construction the cylindrical blocks 129 may be accurately positioned with relation to the peripheral edge of the grinding disks 8 so as to engage the template 114' and thus accurately position the work to be operated on.

Suitable guards or shields 146 are )IO- vided partially surrounding the grinding disks 8.

In operation the work having been mounted upon the work support and the proper adjustment of the template and guides having been made, the grinding disks are rotated and the edge of the work or the surface to be acted upon is presented to the action of the grinding disks.

During this action the work is positively and firmly supported, yet is free to be turned in all directions, v guided by the temwill be ground to navaaai plate and guide blocks, and all surfaces the extent required.

It will of course be understood that if desired the work may be presented to either of the grinding disks at the will of the operator.

Having described my I claim 1. In a grinding machine, in combination, a grinding element, an articulated sectional work carrier pivotally supported and movable in a horizontal plane with relation to the grinding element, and independent adjustable tension devices located in vertical alignment connecting two members of the articulated work carrier.

2. In a grinding machine, in combina tion, a grinding element, a pivoted swinging work carrier comprising a plurality of articulated members and independent adjustable tension devices connecting two of the members of the articulated work carrier, such tension devices being located respectively at or near the top and bottom of the members in vertical ali ent and exerting their force in opposite directions.

3. In a grindin .machine, in combination, a movable grinding element, a swinging work support comprising. a plurality of independently movable articulated members, adjustable anti-friction bearings connecting the said members, and oppositely acting tension devices connecting two of the members at or near the upper and lower pivotal connections in vertical alignment.

4. In a grinding machine in combination, a plurality of grinding disks, a swinging work-carrier located intermediate the grind ing disks, comprising a plurality of articulated members arranged to swing in a horizontal plane, upper and lower tension devices connecting two of such articulated members, said upper tension device exerting a backward pull on one of the articulated members, and the said lower tension device exerting an outward thrust on the said articulated members.

5. In a grinding machine in combination, a plurality of grinding disks mounted at the opposite ends of a rotary shaft, an articulated work-carrier arranged to swing in a horizontal plane, comprising an inner invention,

. member pivotally supported on the frame of the machine, an intermediate member pivotally mounted to the said inner member, and an outer member pivotally supported by the intermediate member, carrying 9. work support, upper and lower tension devices connecting the inner and intermediate members, and a templet carrier movable with the outer member to subject the work carried by the work support to the action of either one of the grinding devices.

6. In a grinding machine in combination,

a plurality of grinding disks mounted at the opposite end of a rotary shaft, a swinging work carrier located intermediate the grinding disks and pivotally supported to swing in its horizontal plane,,sa1d work carrier comprising a plurality of articulated members, adjustable bearings connecting the said members, and independent adjustable tension devices connecting the inner and the intermediate members of the work carrier, a work support mounted upon the outer articulated member, and a templet movable with the outer articulated member, to subject the work carried by the work sup ort to the action of either one of the grinding disks.

7. In a grinding machine in combination, a plurality of grinding disks mounted at the opposite ends of a rotary shaft, a swinging work carrier located intermediate the grinding disks and pivotally supported upon the frame to swing in a horizontal plane with relation to the grindin disks, the said work carrier comprising a plurality of articulated members, and independent adjustable tension device connecting two of the articulated members, a work support 'mounted upon the outer articulated member, and a templet mounted upon one of the pivots of the outer articulated member and movable therewith to subject the work carried by the work support to the action of either one of the grinding disks.

8. In a grinding machine in combination, a plurality of grinding disks, an articulated work carrier arranged to swing in a horizontal plane, comprising an inner member, an intermediate member pivotally mounted to the said inner member and provided with outwardly extending arms pivotall supporting an outer member, upper an lower tension devices connecting the inner and intermediate members in vertical alinement, the said upper tension device comprising a plug engaging a pin carried by the inner member and arranged to enter a socket in the intermediate member, and a spring member provided in said socket to exert a backward pull on the intermediate member.

9. In a grinding machine in combination, a. plurality of grinding disks, an articulated work carrier arranged to swing in a horizontal plane, comprising an inner member, an intermediate member pivotally mounted to the said inner member and provided with outwardly extending arms pivotally supporting an outer mem'ber, upper and lower tension devices connecting the inner and intermediate members in vertical alinement, the said upper tension device comprising a plug engaging a pin carried by the inner member and arranged to enter a socket in the intermediate member, a sprin member provided in said socket to exert a ackward pull on the intermediate member, and said lower tension device exerting an outward thrust on the said intermediate member.

10. In a grimling machine in combination. a plurality of grinding disks, an articulated work carrier arranged to swing in a horizontal plane, comprising an inner member, an intermediate member pivotally mounted to the said inner member and provided with outwardly extending arms pivotallv supporting an outer member, upper and ower tension devices connecting the inner and intermediate members in vertical alinement, the said upper tension device I comprising a plug engaging a pin carried by the inner member and arranged to enter a socket in the intermediate member, a spring member provided in said socket to exert a backward pull on the intermediate member, and said lower tension device comprising a plug fitting ina bearing in the intermediate member and engaging a pin mounted in the inner member, and a spring member arran d to exerta thrust on the said plu to e eat an outward thrust on the interme iate member.

11. In a grinding machine in (,Ombillit';

tion, a plurality of grinding disks, an articulated work-carrier arranged to swing in a horizontal lane comprising an inner articulated mem 1' having outwardly extending lugs, an intermediate articulated member pivotally mounted between said outwardly extending lugs, said intermediate articulated member provided with outwardly extending arms pivotally mounted there- 

